1. It was foggy last October.
(-) It wasn't foggy last October.
(?) Was it foggy last October?
2. You were abroad last year.
(-) You weren't abroad last year.
(?) Were you abroad last year?
3. The pupil was in the library last March.
(-) The pupil wasn't in the library last March.
(?) Was the pupil in the library last March?
4. They were at the seaside last April.
(-) They weren't at the seaside last April.
(?) Were they at the seaside last April?
5. Your friend was at the party last July.
(-) Your friend wasn't at the party last July.
(?) Was your friend at the party last July?